Procaryotic Genera Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024 Phylum Proteobacteria Garrity and Holt 2001 nom. nud. see Phylum Proteobacteria Garrity et al. 2005 stat. inval. Class "Alphaproteobacteria" "Garrity and Holt 2001" nom. nud. see Class Alphaproteobacteria Garrity et al. 2006 Order Rhodospirillales Pfennig and Trüper 1971 (Approved Lists 1980) Family Rhodospirillaceae Pfennig and Trüper 1971 (Approved Lists 1980) Genus Rhodospira Pfennig et al. 1998